In the lumbar region, upper and lower collateral anastomosis of each segmental artery can be obviously found which included 2~3 segments for each segmental artery.
In the lumbar region, upper and lower collateral anastomosis of each segmental artery can be obviously found which included 2~3 segments for each segmental artery.
胸段动脉多见以横向连接吻合，而腰段除此之外还可见明显的动脉上下2~3节段侧支吻合。